1957
DOI: 10.1002/cber.19570900918
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Über Orceinfarbstoffe, IV. Craig‐Verteilung und Verteilungschromatographie

Abstract: Chinol.vl-(4)-bis-i2-methyl-indalyl~-n1ethat1. HBr-Sal:: Aus 0.3 1 g (0.002 Mol) Chinolinnldehyd-(4), 0.52 g (0.004 Mol) 2-Methyl-indol in je 2 ccm Athano1 und 1.5 ccm 40-proz. HBr. Man erwirmt die rote Lasung kurz auf dem Wasserbad und laDt abkiihlen. Nach einiger Zeit tritt Kristdliisation ein. Man saugt ab, wascht mit Alkohol und trocknet i. Vak. uber P 2 0 5 und Paraffin bei etwa 60". Aus Alkohol goldgelbe Prismen, die sich an der Luft allmiihlich leicht braunen. Schrnp. nach viermaligem Umkristallisieren … Show more

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Cited by 12 publications
(2 citation statements)
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“…Except when time was the variable, the colors which developed in 60 minutes were estimated at 630 µ. According to Musso and Beecken (12), phenolindophenol in methanolic potassium hydroxide shows four absorption peaks, the largest of which lies at 635 to 640 mM (e = 39.8 X 103). We have found a very similar maximum (630 to 635 mM) in aqueous base.…”
Section: Resultsmentioning
confidence: 99%
“…Except when time was the variable, the colors which developed in 60 minutes were estimated at 630 µ. According to Musso and Beecken (12), phenolindophenol in methanolic potassium hydroxide shows four absorption peaks, the largest of which lies at 635 to 640 mM (e = 39.8 X 103). We have found a very similar maximum (630 to 635 mM) in aqueous base.…”
Section: Resultsmentioning
confidence: 99%
“…In preparative chromatography, one is generally concerned with the isolation of gram or pound quantities. Obviously, the columnar chromatographic system will best serve to concentrate solutes in the stationary phase of the system so that, ultimately, they may be eluted from the system at a higher concentration (33).…”
Section: Applications Of Liquid-liquid Partition Chromatographymentioning
confidence: 99%